There are numerous words that can be used as synonyms for the word "bood". One of these is "bloodstain", which refers to a mark or an area of fabric that has been stained by blood. Another word that can be used as a synonym is "hemoglobin", which is a protein in red blood cells responsible for transporting oxygen throughout the body. Another is "sanguine", which means optimistic or confident and also refers to the color red. "Hematoma" is another synonym, which refers to a swelling or bruise caused by blood clotted in tissue. Other words that can be used as synonyms for "bood" include "plasma" and "clot".